What conditions can cause koi to protrude their eyes?

The protruding eyes of the fish in the feeding environment must be a problem somewhere in the feeding session.

I: Causes of koi protruding eyes:

1, Overfeeding: For fish 1-3 years old who eat until they are full and don't know they are full until they can't swallow in their mouths, protruding eyes are a common condition.
2, suddenly stop eating: late fall, early winter, the strong cold air makes the water temperature plummet, many fish friends from the day meal to suddenly stop eating, fish intestinal digestive function "was" disorders, eye will be accompanied by a winter.
3, the side effects of high protein: because of the doting on fish, feeding too much "high protein" or water temperature is still below 23 degrees, resulting in indigestion, is a stubborn "protruding eyes".
4, the high water temperature season of a long period of suspension of food: 23-28 degrees is the fish intestinal digestive function is more active stage, because of fish disease treatment or other reasons of suspension of food.

II: Treatment of koi protruding eyes:

(1) Treatment of overfeeding
1、Stop eating (or feed a small amount) for 1-3 days, relying on the fish's own intestinal function to adjust . 
2, warming, the water temperature to about 25 degrees, making the intestinal flora active to achieve the purpose of digestion. 
3、Supplementation of digestive bacteria, through lactobacilli and other aids to digestion flora supplementation (feed mixing) to alleviate and treat. 
4. Garlic, chemo-proprietary medicines and other digestive aids.
(2) Avoidance of sudden stoppage of food
Low-temperature stop eating as if the spring start eating, are a gradual (retreat) process, from multiple meals to a meal; from brood to germ; from feed to vegetables, so that the fish's gastrointestinal tract slowly adapt to the process, do not be too hasty!
(3), high protein feed, additives, or worms, at the water temperature of about 25 degrees to grasp the right time, the right amount of feeding.
(4), high water temperature season because of medication, long time stop eating caused by protruding eyes, can only wait for the fish to recover after slowly adjusted.

Three: reminders:

Regarding the fish's protruding eyes, analyze it. It is basically caused by feeding too much. Especially in summer, the water temperature is high, the fish's appetite is strong and their metabolism is faster. So many fish lovers take advantage of this season to increase the amount of food to help love carp grow. However, it is important to be aware that too much food can overburden the fish and lead to the symptoms of bulging eyes. Please do not be nervous if you find that your Koi has a sudden eye irritation, and do not blindly apply medication. First, reduce the amount of food you feed and increase the aeration, and you will recover slowly.